CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

Analysis of temperature rise in busbar using fluent

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   January 26, 2012, 17:20
Default Analysis of temperature rise in busbar using fluent
  #1
New Member
 
guru
Join Date: Jan 2012
Posts: 9
Rep Power: 5
gaurav_1guru is on a distinguished road
Dear friends,
As a part of my M.Tech project I am associated with calculating the temperature rise in busbars (copper plates) of switchgear.
The geometry consists of copper plates placed inside a closed container with air around it the flow of air is due to natural convection between the busbars also there is conduction through the plates due to a current of 2500 ampere, which results in heat generation. Also the effect of radiation can not be neglected. The analysis is time dependent.
Kindly consider the problem serious and respond as soon as possible.
As I am not an expert in Fluent I am not able to get the results.
Thanking you in advance...
Attached Files
File Type: pdf Simulation_input.pdf (76.7 KB, 61 views)
File Type: pdf simu.pdf (86.7 KB, 50 views)
gaurav_1guru is offline   Reply With Quote

Old   February 18, 2012, 04:02
Default gravity
  #2
Senior Member
 
Vaze
Join Date: Jun 2009
Posts: 133
Rep Power: 8
mvee is on a distinguished road
Hi

put gravity on.
Natural convection in air and sf6 is governed by buoyancy which requires gravity to be on.

Thanks
mvee
mvee is offline   Reply With Quote

Old   February 18, 2012, 13:41
Default
  #3
New Member
 
guru
Join Date: Jan 2012
Posts: 9
Rep Power: 5
gaurav_1guru is on a distinguished road
have u done analysis on this project if yes please provide more details and if possible send me details at gauravisguru@gmail.com
gaurav_1guru is offline   Reply With Quote

Old   February 21, 2012, 02:46
Default
  #4
New Member
 
sreenivas
Join Date: Jul 2010
Posts: 23
Rep Power: 6
sreenivas is on a distinguished road
HI Guarav

For this kind of simulation you need to consider all the modes of heat transfer.For this you need to have the solid mesh surrounded by the fluid mesh( for simulating Natural convection and Radiation).First simulate the Conduction part and then you will get an idea about the wall temperature and use this as temperature boundary condition when you resolving buoyancy driven flows and Radiation heat transfer.Make sure that your gravity is switched on for this.By looking at the residuals ...there is no need to run for that many iterations...may be 2000 to 3000 iteration will be sufficient to come to conclusion

let me know if you need anything

Regards
srinivas
sreenivas is offline   Reply With Quote

Old   March 4, 2012, 13:27
Default
  #5
New Member
 
guru
Join Date: Jan 2012
Posts: 9
Rep Power: 5
gaurav_1guru is on a distinguished road
I am still having problem with the switchgear project.
Please see if u can help.

I am doing 2D analysis
PROBLEM SETUP
general
1. solver is density based
2. first i am doing steady analysis, then will see transient.
3. putting gravity on at Y = -9.81 m/s2
models
1. energy on
materials
1. fluid is air (incompressible ideal gas)
2. solid is copper
cell zone condition
1. adding energy source term in solid (82413 W/m3)
boundary condition
1. zero heat flux for boundary (container)
2. bus bar edges walls are coupled in thermal tab

Also, I am attaching the mesh and case file, although some elements are highly skewed.

Also see that if i am doing correct calculation for heat generation
I have taken Q= I *I*R (i square r)

thus volumetric heat generation is Qgen = (I*I*R) / V
gaurav_1guru is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fluent Temperature Profiles jcd84 FLUENT 0 January 24, 2011 14:34
Can fluent predict temperature in Entrance region(Tube) mohammadkm FLUENT 0 May 12, 2010 04:16
problem with temperature field in modeling evaporation with fluent MOhaj FLUENT 0 April 24, 2010 23:54
Exporting temperature results fro fluent to Ansys vinay kulkarni FLUENT 1 February 21, 2007 04:31
HELP!:CFD modelling using FLUENT in swimming pool Tee Main CFD Forum 0 September 7, 2005 20:48


All times are GMT -4. The time now is 19:42.